Tang Shanshan, He Yan, Deng Xingfa, Cui Xuemin
Guangxi Key Lab of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Molecules. 2022 Apr 15;27(8):2557. doi: 10.3390/molecules27082557.
Metakaolin-based geopolymer microspheres (MGM) with hierarchical pore structures were prepared by suspension dispersion method in dimethicone at 80 °C. The hydrothermal modification of MGM was carried out at a lower temperature of 80 °C, and a NaA molecular sieve converted from metakaolin-based geopolymer (NMGM) with good crystal structure was prepared and applied in thermal catalytic cracking of low-density polyethylene (LDPE) reaction. The one-pot two-stage thermal catalytic cracking of LDPE was carried out in a 100 mL micro-autoclave under normal pressure. In this work, the optimal proportions and optimal reaction conditions of catalysts for NMGM thermal catalytic cracking of LDPE waste to fuel oil were investigated. The NMGM catalyst showed high selectivity to the liquid product of thermal catalytic cracking of waste LDPE. Under the reaction conditions of reaction time of 1 h and reaction temperature of 400 °C, the liquid-phase yield of thermal catalytic cracking of LDPE reached a high of 88.45%, of which the content of gasoline components was 10.14% and the content of diesel components was 80.97%.
采用悬浮分散法在80℃的二甲基硅油中制备了具有分级孔结构的偏高岭土基地质聚合物微球（MGM）。MGM的水热改性在80℃的较低温度下进行，制备了具有良好晶体结构的由偏高岭土基地质聚合物转化而来的NaA分子筛（NMGM），并将其应用于低密度聚乙烯（LDPE）的热催化裂解反应中。LDPE的一锅两阶段热催化裂解在100 mL微型高压釜中常压下进行。在这项工作中，研究了NMGM热催化裂解LDPE废料制燃油的催化剂最佳比例和最佳反应条件。NMGM催化剂对废LDPE热催化裂解的液体产物表现出高选择性。在反应时间为1 h、反应温度为400℃的反应条件下，LDPE热催化裂解的液相产率高达88.45%，其中汽油组分含量为10.14%，柴油组分含量为80.97%。
